<template>
  <div class="article-container">
    <!-- 导航栏 -->
    <van-nav-bar
      class="page-nav-bar"
      left-arrow
      title="黑马头条"
      @click-left="$router.back()"
    ></van-nav-bar>
    <!-- /导航栏 -->

    <div class="main-wrap">
      <!-- 加载中 -->
      <div v-if="loading" class="loading-wrap">
        <van-loading color="#3296fa" vertical>加载中</van-loading>
      </div>
      <!-- /加载中 -->
      <template v-else>
        <!-- 加载完成-文章详情 -->
        <div v-if="article.title" class="article-detail">
          <!-- 文章标题 -->
          <h1 class="article-title">{{ article.title }}</h1>
          <!-- /文章标题 -->

          <!-- 用户信息 -->
          <van-cell class="user-info" center :border="false">
            <van-image
              class="avatar"
              slot="icon"
              round
              fit="cover"
              :src="article.aut_photo"
            />
            <div slot="title" class="user-name">{{ article.aut_name }}</div>
            <div slot="label" class="publish-date">{{ article.pubdate }}</div>
            <!-- <FollowUser
              :is-followed="article.is - followed"
              :user-id="article.aut_id"
              @update-is-followed="article.is_followed = $event"
            ></FollowUser> -->
            <FollowUser
              v-model="article.is_followed"
              :userId="article.aut_id"
            ></FollowUser>
          </van-cell>
          <!-- /用户信息 -->

          <!-- 文章内容 -->
          <div
            class="article-content markdown-body"
            v-html="article.content"
            ref="article-content"
          ></div>
          <van-divider>正文结束</van-divider>
          <comment-list
            :source="article.art_id"
            @on-load="totalCommentCount = $event.total_count"
            @reply-click="onReplyClick"
          ></comment-list>
        </div>
        <!-- /加载完成-文章详情 -->
        <!-- /加载失败：其它未知错误（例如网络原因或服务端异常） -->
      </template>
    </div>
    <!-- 底部区域 -->
    <div class="article-bottom" v-if="article.title">
      <van-button
        class="comment-btn"
        type="default"
        round
        size="small"
        @click="isPostShow = true"
        >写评论</van-button
      >
      <van-icon name="comment-o" :info="totalCommentCount" color="#777" />
      <CollectArticle
        v-model="article.is_collected"
        :articleId="article.art_id"
      ></CollectArticle>
      <likeArticle
        v-model="article.attitude"
        :articleId="article.art_id"
      ></likeArticle>
      <van-icon name="share" color="#777777"></van-icon>
    </div>
    <!-- /底部区域 -->
    <van-popup v-model="isPostShow" position="bottom">
      <comment-post
        :target="article.art_id"
        @onpost-success="isPostShow = false"
      ></comment-post>
    </van-popup>
    <van-popup
      v-model="isReplyShow"
      position="bottom"
      :style="{ height: '100%' }"
    >
      <comment-reply
        v-if="isReplyShow"
        :comment="currentComment"
        @close="isReplyShow = false"
      ></comment-reply>
      <!-- :comment="currentComment" -->
    </van-popup>
  </div>
</template>

<script>
// 方式1 js引用
import 'github-markdown-css/github-markdown.css'
import { getArticleById } from '@/api/article'
import { ImagePreview } from 'vant'
// import { addFollow, deleteFollow } from '@/api/user'
import FollowUser from '@/components/follow-user/index.vue'
import CollectArticle from '@/components/collect-article/index.vue'
import LikeArticle from '@/components/like-article/index.vue'
import CommentList from './components/comment-list.vue'
import CommentPost from './components/comment-post.vue'
import CommentReply from './components/comment-reply.vue'
export default {
  name: 'ArticleIndex',
  components: { FollowUser, CollectArticle, LikeArticle, CommentList, CommentPost, CommentReply },
  provide () {
    return {
      articleId: this.articleId
    }
  },
  props: {
    articleId: {
      type: [Number, String, Object],
      required: true
    }
  },
  data () {
    return {
      article: {},
      loading: true,
      errorStatus: 0,
      totalCommentCount: 0,
      isPostShow: false,
      commentList: [],
      isReplyShow: false,
      currentComment: {}
    }
  },
  computed: {},
  watch: {},
  async created () {
    try {
      const { data: { data } } = await getArticleById(this.articleId)
      // if (Math.random() > 0.3) {
      //   throw new function () {
      //     this.response = { state: 500 }
      //   }()
      // }
      this.article = data
      // 得到数据之后,渲染页面,异步操作(Promise.then)
      // 同步代码获取页面元素不可以
      // console.log(this.$refs['article-content'])
      // 方式1.用Promise.then
      /*
      const p = new Promise(resolve => resolve())
      p.then(() => {
        console.log(this.$refs['article-content'])
      })
      */
      // 方式2.$nextTick,异步操作(Promise.then)
      /*
      this.$nextTick(() => {
        console.log(this.$refs['article-content'])
      })
      */
      this.loading = false
      setTimeout(() => {
        const images = []
        const imgs = this.$refs['article-content'].querySelectorAll('img')
        imgs.forEach((t, i) => {
          images.push(t.src)
          imgs[i].onclick = function () {
            ImagePreview({
              images,
              startPosition: i
            })
          }
        })
      }, 0)
    } catch (e) {
      this.loading = false
      this.errorStatus = e.response.status === 404 ? 404 : 500
    }
  },
  mounted () {},
  methods: {
    onReplyClick (comment) {
      console.log(comment)
      this.currentComment = comment
      this.isReplyShow = true
    },
    onPostSuccess (comment) {
      this.isPostShow = false
      this.commentList.unshift(comment)
    }
    // async onFollow () {
    //   this.follLoading = true
    //   try {
    //     if (this.article.is_followed) {
    //       // 取消
    //       await deleteFollow(this.article.aut_id)
    //     } else {
    //       // 关注
    //       await addFollow(this.article.aut_id)
    //     }
    //     this.article.is_followed = !this.article.is_followed
    //   } catch (error) {
    //     if (error.response && error.response.status === 400) {
    //       return this.$toast('不能关注自己')
    //     }
    //     this.$toast('服务器错误')
    //   }
    //   this.follLoading = false
    // }
    // ImagePreview({
    //   images: [
    //     'https://img01.yzcdn.cn/vant/cat.jpeg',
    //     'https://img01.yzcdn.cn/vant/cat.jpeg'
    //   ],
    //   startPosition: 1
    // })
    // import { Loading } from 'v0ant'
  }
}
</script>

<style scoped lang="less">
// 引入样式文件 less引用
// @import "~@/style/github-markdown-light.less";
/deep/ img {
  // width: 100%;
  width: 95vw;
}
// color里面不能带单双引号
/deep/ .van-nav-bar .van-icon {
  color: rgb(10, 10, 10) !important;
}
.article-container {
  .main-wrap {
    position: fixed;
    left: 0;
    right: 0;
    top: 92px;
    bottom: 88px;
    overflow-y: scroll;
    background-color: #fff;
  }
  .article-detail {
    .article-title {
      font-size: 40px;
      padding: 50px 32px;
      margin: 0;
      color: #3a3a3a;
    }

    .user-info {
      padding: 0 32px;
      .avatar {
        width: 70px;
        height: 70px;
        margin-right: 17px;
      }
      .van-cell__label {
        margin-top: 0;
      }
      .user-name {
        font-size: 24px;
        color: #3a3a3a;
      }
      .publish-date {
        font-size: 23px;
        color: #b7b7b7;
      }
      .follow-btn {
        width: 170px;
        height: 58px;
      }
    }

    .article-content {
      padding: 55px 32px;
      /deep/ p {
        text-align: justify;
      }
    }
  }

  .loading-wrap {
    padding: 200px 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
  }

  .error-wrap {
    padding: 200px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    .van-icon {
      font-size: 122px;
      color: #b4b4b4;
    }
    .text {
      font-size: 30px;
      color: #666666;
      margin: 33px 0 46px;
    }
    .retry-btn {
      width: 280px;
      height: 70px;
      line-height: 70px;
      border: 1px solid #c3c3c3;
      font-size: 30px;
      color: #666666;
    }
  }

  .article-bottom {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-sizing: border-box;
    height: 88px;
    border-top: 1px solid #d8d8d8;
    background-color: #fff;
    .comment-btn {
      width: 282px;
      height: 46px;
      border: 2px solid #eeeeee;
      font-size: 30px;
      line-height: 46px;
      color: #a7a7a7;
    }
    .van-icon {
      font-size: 40px;
      .van-info {
        font-size: 16px;
        background-color: #e22829;
      }
    }
  }
}
</style>
